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Finding the Fourth Proportional to 449.37, 673.47 and 391.32

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Solution

The fourth proportional to 449.37, 673.47 and 391.32 is: 586.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.37 : 673.47 = 391.32 : x
  2. Step 2: Convert to fraction form
    449.37/673.47 = 391.32/x
  3. Step 3: Cross multiply
    449.37x = 673.47 × 391.32
  4. Step 4: Simplify right side
    449.37x = 263,542.28
  5. Step 5: Solve for x
    x = 263,542.28/449.37
  6. Step 6: Final answer
    x = 586.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.